Rockstar
The Terrestrial Shrub Rover by Jason Shull is a go kart adorned with a fiberglass dome and fake shrubbery. The electric-powered, stake-out vehicle, which debuted at Grounds for Sculpture, is a small, single person surveillance unit that will allow you to spy on others fairly undetected.

Whether you find the Terrestrial Shrub Rover to be creepy or creative, there is obviously a market for such things. I think it would be more effective if the shape was more natural, though, instead of a perfectly trimmed cube.